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Protein synthesis in liver, muscle and gill of mullet (Mugil cephalus L.) in vivo
Haschemeyer, A.E.; Smith, A.E. (1979). Protein synthesis in liver, muscle and gill of mullet (Mugil cephalus L.) in vivo. Biol. Bull. 156(1): 93-102
In: The Biological Bulletin. Marine Biological Laboratory: Lancaster. ISSN 0006-3185; e-ISSN 1939-8697, meer
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  • Haschemeyer, A.E.
  • Smith, A.E.
Abstract
    1. Protein synthesis in mullet was measured by use of pulse injections of 14Cleucine into the hepatic portal circulation and by 4-hr continuous infusion of 14Ctyrosine into the dorsal aorta. 2. Liver protein synthesis was 37 mg/day per g wet weight of tissue. Plasma proteins accounted for about 25% of total liver protein synthesis. Replacement rate for intrahepatic proteins was 20%/day. Average polypeptide chain synthesis time was 3 min. 3. Gill protein synthesis was comparable to that in liver with a replacement rate of 23%/day. 4. Muscle protein synthetic rate was 0.54%/day, comparable to rates in rabbit and sheep when temperature difference is taken into account. 5. Constant infusion is shown to be a feasible technique for measurement of protein metabolism of fish in vivo.
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